How can I convert time and electric field in SI unit to these in atomic system of units?

Hello. Let's say time tsi = 10 s, electric field strength Esi = 10 V/m in SI unit. In order to convert these to those in atomic system of units, I think right procedure is that tat =...

07 August 2016 5,721 1 View

How can I choose magnetic quantum number m for ADK tunnel-ionization model?

07 August 2016 9,120 5 View

Why does ICP (Inductively Coupled Plasma) simulation like COMSOL usually consider only 1st excited state in Argon plasma?

Hello. As the title said, I really want to know the specific reason why ICP simulation (espcially using COMSOL) typically consider only 1st excited state in Argon plasma? As listed in the...

06 July 2016 6,422 6 View

What is plasma surface activation?

Hello. I'm now studying surface treatment by plasma and many "surface activation" are observed in my search. According to their articles, surface activation is to help surface to bond with some...

04 May 2016 9,707 2 View

Is there any absorber for MHz to ~100 MHz range?

Hello. I was thinking about building Faraday cage to shield the radiation EMI of ~1 to 100 MHz frequency from inside and asked several question here. One interesting answer is that The cage could...

06 July 2015 155 5 View

Why is base-emitter voltage in transistor always assumed as 0.6 V?

05 June 2015 911 8 View

How to measure electron density of 10^13 cm^(-3) order in plasma?

Hello. I would like to measure electron density of Argon ICP (Inductively Coupled Plasma). Our goal is to generate ICP with electron density of 10^13 cm^(-3) order thus the range of this density...

05 June 2015 479 14 View

How can I explain gas discharge with hollow electrodes?

Hello. The mechanism of the gas discharge is quite well-known when the gas is filled between two plane electrodes. In this case electron emission from cathode have significant role to get into...

03 April 2015 1,052 8 View

Can a photon with more energy than energy level difference be effectively absorbed?

Hello. It is well known that photon is well absorbed to the atom (or ion) if energy difference between two levels are perfectly matched to the photon energy. What about the case that photon energy...

02 March 2015 3,460 5 View

How can I calculate the laser intensity after laser passes through axicon?

Hello. For typical spherical lens, calculation of the focused intensity for the laser is simple: numerical number gives diffraction limited focused radius of the laser thus everything is...

01 February 2015 1,389 6 View

How to analyze a particular region of my simulation box in GROMACS?

Hi, I am using GROMACS 5.1.4 to simulate water in contact with a surface. I am only interested to calculate some properties of water near the surface. Let's say at a distance of x nm from the...

03 March 2021 9,989 2 View

How do I increase the yield of my PCR product?

Hello, We would like to increase the yield of our PCR product. We are running a series of PCR reactions that is targeting ~1.1kb sequence. We begin each reaction with ~400pg of template DNA...

02 March 2021 4,029 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

How to formulate Energy minimization in Molecular dynamics simulation for alloys using meam potential?

during MD simulation, the atoms are not moving as per required. The problem (as per my observation) lies in energy minimization technique. upon application of tensile strain in x or y direction,...

22 February 2021 380 5 View

What is the best etching method for Mg-Ca alloy?

I have used Picral etchant (4.2 g Picric acid, 10 mL Acetic acid, 70 mL Ethanol, 10 mL distilled water) but it didn't work. Is there any alternative?

21 February 2021 2,558 5 View

Magnetismic Gravity in the universe?

MAGNETISMIC GRAVITY What is magnetism? Something magnetic has a + and - charge. If 2 + or - are pushed if + and - are pulled. But what is the main reason for this? Why does magnetism have a pull...

21 February 2021 9,538 3 View

Has anyone succeeded in capturing uranium atoms in a fullerene structure?

Additional questions are: What are the encapsulating atoms? How difficult was the process and what rates were achieved? What factors most seriously affect the economics?

20 February 2021 3,134 5 View

How to get the vector of a specific vibration mode in phonon dispersion?

For example, I have this phonon dispersion(Fig. 1), and now I would like get vector of atoms which describes TA1 in P. I know v_sim can show vibrational animation of specific mode, but I do not...

20 February 2021 4,332 4 View

What are the potential shell well and atomic solvation parameters for the boron atom?

I have a protein-ligand docking project. The ligand contains boron atoms that are not detected by Autodock software. To solve this problem, it is necessary to introduce the boron atom to...

19 February 2021 1,236 1 View